Pupil desk



March 18, 1924. J. MULLER PUPIL' DESK Fi-l ed Aug. 31 1921 llllLi llllllllll Patented Mar. 18, 1924.

UNITED STATES PATENT FF cE.

JOSE]? M'ULLER, OF KONSTANZ, GERI/IAN Y.

PUPIL DESK.

Application filed August 31, 1921. Serial No. 497,451

" Toull whom it may concern: 2

Be it known that I, Josnr MI'JLLER, a citizen of Germany, and resident of Konstanz, Germany, Zogelmannstr. 2, have invented Q certain new. and useful Improvements in Pupil Desks, of which the following is a people with small revenues, who cannot afford to buy fortheir children the complicated and expensive desks now in use, the latterbeing commonly combined with a special chain. The fact that poor people do not have room for a complicated and voluminous piece constitutes a further reason why they are notable to purchase desks as heretofore constructed.

According to my invention I propose to employ a relatively simple plate or table, two supports, for holding the same and means for fastening the supports to a common, chain A further object of the invention is to provide a pupil-desk having a relatively high degree of resistance against strains.

A still further object of my invention is to provide a pupil-desk which may be set up or dismantled in a relatively short time and which may be packed within a relative ly small space.

IVith the above objects in view, the in vention consists in the construction, combination and arrangement of parts hereinafter fully described, claimed and illustrated in the accompanying drawings, wherein Fig. l is a perspective view of the pupildesk in set-up position;

Fig. 2 shows the means for clamping or fixing the supports to a chair;

Fig. 3 shows a side elevation of a part of the pupil-desk;

Fig. 4 shows the underside of 'the table according to a modification of the pupildesk;

Figs. 5 and 6 show details appertaining to this modification;

Fig. 7 is a view of the underside of the table in the same modification with the supports in a position enabling the desk to be packed in a small space; and I Fig. 8 shows the underside of a still further modification of the pupil-desk according to my invention.

In the modification shown in Figures 1-3, a table 30 is provided with a traverse 25, adjacent to which a short holder 26 is provided. The latter has a recesspermitting the entrance of the reduced end portion 27 of a small supporting beam 28. At the other side of the undersurface of the table 30 a traverse 29 with a reinforcing part 31 is disposed, a cylindrical hole being provided in this part for engagement with the upper cylindrical end of a support 21.

The said support 21 and a second support 22 are forked, as shown at 24 and 23 respectively, and the upper end of the sup-, port 22 is also forked and rigidly fixed by a pin to the supporting beam 28.

For fastening the supports 21 and 22 to a chair 20, a clamping device is provided consisting of two bars 18 and 19 and a clamping screw 17, the outer ends of the said bars being adapted to be fixed to the supports 21 and 22 by means of clamping screws and 16 passing through thesaid ends of the bars 18 and 19 and the lower ends of the supports 21 and 22. The outer ends of the bar 19 are provided with recesses 13 and '14, into whichthe supports 21 and 22 enter when the nuts of the screws 15 and 16 are screwed down. The clamping effect is increased when the screw 17 is screwed down in consequence of the fact that the distance between the outer ends of the bars is thereby increased. Therefore, by screwing down the nut of the screw 17, the bar 19 carrying the supports 21 and 22, the bar 18 and the chair are connected together in a very rigid manner.

In order to prevent the pupil on the chair from moving the left-hand end of the table forwardly relatively to the supporting beam 28 with his breast, a holding device 12 may be provided, consisting of an eye pivotally mounted on the rear board of the table, as shown in Fig. 3, and falling down over a pin projecting from the supporting beam 28.

In the modification as illustrated in Figs. 47, both supports are constructed in the same manner as shown in Fig. 6, i. e. each support is forked at both ends and rigidly secured to'a supporting beam 28 in the same manner as above described with re spect to the support 22 of Fig. 1. Each end, however, of the fork 8 is of wedge shape, as shown in Fig. 6, and the ends are adapted to enter the correspondingly formed recesses 7 of the respective traverses lOand -11. 'X'V hen it is desired to bring the table 30 nearer to the body of the pupil, the parts 8 of the supports may be engaged with the recesses 6. A traverse 9 rigidly fixed to the table is spacedat its ends from the traverses 10;and

11 on the table, and .the supporting beams 28 when the parts are set up lie along the inner .edges of the traverses 10 and 11 and fill said space. Accordingly, the-traverse 9 prevents the parts 8 from being disengaged from the recesses E6 or 7, as thecasemay be.

As shown in 7, the supports are of such dimensions and the traverses 10 and 11 at such a distance from each other that the former may be brought between the latter, whereby only a small space is required for packing the table or putting it away when not in use.

In the modification illustrated in Fig. 8 two holders 33 and 36% are provided adjacent to the traverse .25. The supporting beam 28 has substantially the same shape as the supporting beam 28 :of Fig. 1, i. e. it is so .flat that in a position .rectangularly to that illustrated in Fig. .8 its entrance ,may be effected into a recess 35 [of the holder 34. Moreover, .the suppont-in-g beam 28" .is ,provided at each of its ends with a cylindrical projection .31 32, so that .it .is pi-votall-y mounted .in :the' holders 33 and 3d and may be swung from the position shown in F 8 to a position as shown in Fig. 1. The bone 36 is ,deep enough for permitting the axial shifting .of the supporting beam 28". I

7 When in the position illustrated in Fig. 8, the support 22 enters afiat =recess 37 in the traverse 25, sothat the support may be brought into a position closely adjacent to the table.

lVhat I claim is:

1. In a pupil-desk, a table, two supports for holdingthe same, two bars adapted to :extend across the two front legs of a chair,

one of them having recesses at its ends outside of the legs of the chair adapted :to be entered by the supports, iafastening in :the middle of :the bars for drawing the bars to each other, and Ifastenings for holding the supports in the recesses of the bars and clamping the ends (of the bars on the legs ofzthe chair.

In .a pupil-desk, .a table, two supports for holding the same having recesses in their lower :ends, two 'bars adapted to traverse the two front Ilegsof achair, a screw in the middle of the bars for. drawing the bars to each other, and recesses ion the outer ends of one of the bars the recesses being adapted to be entered by thesupports, and clamping screws in the outerends of the bars adapted to traverse the said recesses of the supports and to .draw the. supports into the recesses of the bars. I

In testimony that Lcjlaim the foregoing as my invention, I have signed m-yhname in presence of two subscribing witnesses.

JOSEF MULLER.

Witnesses:

HnRMaNN RAM-BERGER, lPHlLIlP R'cisoH. 

